Autolite Spark Plugs

[bogdan]

Will do a valve lash inspection and plug change on my 2004 R1150R soon. I seem to remember a good number saying that Autolite spark plugs are a better choice for oilheads than the Bosh and NGK I've been using. Is that still the consensus? Also two versions are listed: Copper and Xtreme Sport. What's the difference and what would you recommend? Does Bemmer Boneyard carry them?

 

[20774]

There are several threads in the Similar Thread pane below that mention Autolite...might be a good place to start.

 

[pauls1150]

Their "Extreme Sport" plugs have iridium center tips, so they will last longer. Be extra careful when checking or changing the gap, as it's also easier to chip the insulator when doing so.
https://www.autolite.com/products/sport/xtreme-sport

I use the NGKs these days, since they're so easy to get (or order) from any auto parts store.
The "center" plug - BKR7EKC-N (part # 2095) for "standard", or BKR7-EIX (part # 2667) for iridium;
the "secondary" (peripheral) plug - DCPR6E (part # 3481) for "standard", or DCPR6-EIX (part # 8196) for iridium.

Don't confuse the 1100 plugs with the 1150 plugs - the 1100's love the Autolite 3923.

 

[senseamidmadness]

Don't confuse the 1100 plugs with the 1150 plugs - the 1100's love the Autolite 3923.

That's interesting. Did they have different specified spark plugs from the factory?

 

[pauls1150]

Yes. (I "think" the 3924 is the sub for the center plug.)

EDIT: Thanks, GSAddict! (post 7)

 

[rogerc60]

Don't confuse the 1100 plugs with the 1150 plugs - the 1100's love the Autolite 3923.

My single spark R1150RT loves them, too.

 

[gsaddict]

3922 for the 1150's (main plug)
I like the platinum version 3922P, they last longer and wont rust on the outside.

 

[jrogers]

Single Spark Plug

We only use the Autolite plug in our single spark R1150R's. I seems to help get the surging to a minimum. The dual sparks we have all use the NGK plugs.

 

[bogdan]

I believe I now get it. Autolites are a single spark plug thing. I'll stick to what I've been using. Thanks for the info.

 

[pauls1150]

Review posts 3 and 7 ... the proper Autolite doesn't much care what engine it's screwed into.

 

[ksdcr]

What is the recommended gap for the Autolite 3923’s ?

Thanks.

 

[gsaddict]

Factory set @.032"

 

[ksdcr]

GS Addict,

Thanks.

I’ve read on some threads, that a slightly smaller gap, than factory is recommended. What are your thoughts deviating from factory?

 

[gsaddict]

No, never had an issue to warrant changing the gap.
They work great for me right out of the box.

 

[ksdcr]

Installed a fresh set of Autolite 3923’s this morning what a pleasant difference, from the 10,000 mile Bosch plugs, that were remove. Throttle response is very linear, Right past the 2900-3200 rpm area, which had a sought stumping before.

Good advice, thanks all.